EPOS ADAPT 135T USB II Mono Teams Headset, USB-A + 3.5mm

One Cable, Straight Into Teams

Some workdays live almost entirely inside Microsoft Teams — back-to-back calls, a quick huddle, a screen share, then the next one. The EPOS ADAPT 135T USB II is built for exactly that day. It's a wired, single-ear office headset certified for Microsoft Teams, with a dedicated Teams button on the inline controller that takes you straight to the app. Plug it into a USB-A port and it works — no setup, no driver hunt, no dropped first call while you fiddle with audio settings.

This is the Teams-certified ADAPT 135T from EPOS, the enterprise audio brand spun out of Sennheiser, so the engineering pedigree behind the sound is the same one that built Sennheiser's reputation. One ear open to stay aware of the room, a noise-cancelling mic so colleagues hear you and not the office, and a headset light enough to wear from the first meeting to the last.

What "Teams certified" actually gets you on the ADAPT 135T

Microsoft Teams certification isn't a sticker — it means Microsoft tested this headset against their audio standards and it passed, so calls sound the way Teams intends and the controls map correctly every time.

[card title="The dedicated Teams button"]

The inline controller has a button wired specifically to Teams. Tap it to bring Teams to the front, see notifications, or join a meeting — and it glows to flag when something needs you. It's the difference between hunting for the Teams window in a stack of apps and having it one thumb-press away on the cord already in your hand.

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If your organization runs on Teams, that certification is the reason to pick the 135T over the plain 135. Both are tuned for unified communications and work with the softphones your team already uses — Zoom, Google Meet, Webex — but only the 135T carries the Teams button and the certification behind it.

Microphone and call clarity on the ADAPT 135T

The noise cancelling lives in the microphone, and it works for the person on the other end. The boom mic sits near your mouth and the noise-cancelling element filters the background — the colleague mid-conversation, the keyboard clatter, the open-plan hum — out of what you transmit, so your caller hears your voice instead of the room behind it.

Backing the mic is EPOS Voice — the DSP processing that smooths your audio so it comes through natural and clear rather than thin or harsh, even when the line gets busy. It's the quiet reason a call on this headset sounds easy to listen to over a full day.

[callout type="honest"]Worth being clear: this is a noise-cancelling microphone, not active noise cancellation for your ears. There's no ANC on the 135T — if you need to electronically silence a loud room for yourself, that's a higher model in the ADAPT line. And it's a single-ear (mono) headset, which keeps one ear open for the room. That's the right call for a busy office; it's not the headset for sealing yourself into silence.[/callout]

Flexible connection — USB-A today, 3.5 mm anywhere

The headset ends in a 3.5 mm jack, and the included detachable USB cable adds a USB-A connector with the inline Teams controller. That's two ways to connect from one headset: USB-A into your computer for the full Teams experience and call controls, or unplug the USB cable and run the bare 3.5 mm jack straight into a laptop, a phone, or a tablet.

[callout type="tip"]The detachable cable is more useful than it sounds. Leave the USB controller plugged in at your desk for Teams calls, then pull it off and drop the 3.5 mm jack into your phone for the commute — one headset covering both, with nothing extra to carry. The cable also detaches for storage, which is why it folds down small for a bag.[/callout]

Built for the all-day shift, and your ears

At a featherweight build with leatherette cushions over large speakers, the ADAPT 135T sits comfortably through back-to-back calls without the clamp-headache cheaper headsets bring on by mid-afternoon. The headband adjusts to your fit, and the whole thing folds flat for travel or a desk drawer.

The detail that protects you across years of calls: ActiveGard. It guards against sudden acoustic spikes on the line — a feedback screech, a fault on the call — by limiting them before they hit your ear at full volume. Over a career of headset work, that protection is the kind of thing you don't notice until the day it saves you from a nasty jolt.

What the EPOS ADAPT 135T works with

Connect over USB-A to any Windows or Mac computer and the ADAPT 135T is certified for Microsoft Teams and optimized for the other major UC platforms — so it works with Zoom, Google Meet, Webex, and the softphone your team already runs. The 3.5 mm jack handles anything with a standard headphone port: laptops, smartphones, tablets. The inline controls put answer/end, volume, mute, and the Teams button on the cord, no reaching for the screen.

What you're buying is a headset that starts working the moment it's plugged in and keeps your Teams calls clear, comfortable, and consistent from morning to sign-off — with a second 3.5 mm life on your phone the moment you unplug. For a Teams-first desk, that's the headset doing its whole job and staying out of the way.